Antenna structure and electronic device using same

Abstract

An antenna structure of reduced size but able to operate at multiple frequencies, and applied to an electronic device, includes a housing, a first feed point, a first radiation portion, a first ground point, a second radiation portion, and a second feed point. The housing has at least one portion made of metal material with first and second gaps therein. The housing between first and second gaps forms the first radiation portion. The first feed point feeds current and signal to the first radiation portion. The first ground point is spaced from the first feed point and is grounded through a first inductive element. The second radiation portion is adjacent to the first radiation portion. The second feed point is electrically connected to a second signal point and feeds current and signal to the second radiation portion.

What is claimed is: 
     
       1. An antenna structure applied to an electronic device, the antenna structure comprising:
 a housing with at least one portion made of metal material, wherein the housing defines a first gap and a second gap, the housing between the first gap and the second gap form a first radiation portion; 
 a first feed point positioned on the first radiation portion and electrically connected to a first signal point, for feeding current and signal to the first radiation portion; 
 a first ground point positioned on the first radiation portion and spaced apart from the first feed point, the first ground point being grounded through a first inductive element; 
 a second radiation portion adjacent to the first radiation portion; and 
 a second feed point positioned on the second radiation portion and electrically connected to a second signal point, for feeding current and signal to the second radiation portion; and 
 a second ground point positioned on the second radiation portion and further away from the second gap than the second feed point, and the second ground point grounded through a second inductive element. 
 
     
     
       2. The antenna structure of  claim 1 , wherein when the second feed point supplies a current, the current is coupled to the first inductive element through the second gap, and is grounded to excite an ultra-high frequency mode and 5G NR N77 and N78 modes. 
     
     
       3. The antenna structure of  claim 1 , wherein when the second feed point supplies a current, the current flows through a portion of the second radiation portion between the second feed point and an end of the second radiation portion away from the second gap, to excite an 5G NR N79 mode. 
     
     
       4. The antenna structure of  claim 1 , wherein when the second feed point supplies a current, the current flows through aside of the second radiation portion adjacent to the second gap, and is coupled to the first inductive element through the second gap, to excite an ultra-high frequency, 5G NR N77, N78 modes. 
     
     
       5. The antenna structure of  claim 1 , wherein when the second feed point supplies a current, the current flows through a portion of the second radiation portion between the second feed point and the second ground point, and is grounded through the second inductive element, to excite a 5G NR N79 mode. 
     
     
       6. The antenna structure of  claim 1 , wherein the housing comprises a side frame, the first radiation portion and the second radiation portion are positioned on the side frame. 
     
     
       7. The antenna structure of  claim 1 , wherein when the first feed point supplies a current, the current flows through a portion of the first radiation portion between the first feed point and the second gap, and is grounded through the first inductive element, to excite an LTE-A high frequency and a 5G NR N79 mode. 
     
     
       8. The antenna structure of  claim 1 , further comprising a switch point, wherein the switching point is positioned on the first radiation portion and is adjacent to the first gap relative to the first feed point, the switching point and the first ground point are positioned at two sides of the first feed point, the switching point is grounded through a switch circuit. 
     
     
       9. The antenna structure of  claim 8 , wherein the switch circuit comprises a switching unit and a plurality of switching elements, the switching unit is electrically connected to the switching point, one end of each switching element is electrically connected to the switching unit, and the other end of each first switching element is grounded. 
     
     
       10. A electronic device, comprising:
 an antenna structure comprising:
 a housing with at least one portion made of metal material, wherein the housing defines a first gap and a second gap, the housing between the first gap and the second gap form a first radiation portion; 
 a first feed point positioned on the first radiation portion and electrically connected to a first signal point, for feeding current and signal to the first radiation portion; 
 a first ground point positioned on the first radiation portion and spaced apart from the first feed point, the first ground point being grounded through a first inductive element; 
 a second radiation portion adjacent to the first radiation portion; and 
 a second feed point positioned on the second radiation portion and electrically connected to a second signal point, for feeding current and signal to the second radiation portion; and 
 a second ground point positioned on the second radiation portion and further away from the second gap than the second feed point, and the second ground point grounded through a second inductive element. 
 
 
     
     
       11. The electronic device of  claim 10 , wherein when the second feed point supplies a current, the current is coupled to the first inductive element through the second gap, and is grounded to excite an ultra-high frequency mode and 5G NR N77 and N78 modes. 
     
     
       12. The electronic device of  claim 10 , wherein when the second feed point supplies a current, the current flows through a portion of the second radiation portion between the second feed point and an end of the second radiation portion away from the second gap, to excite an 5G NR N79 mode. 
     
     
       13. The electronic device of  claim 10 , wherein when the second feed point supplies a current, the current flows through the side of the second radiation portion near the second gap, and is coupled to the first inductive element through the second gap, to excite an ultra-high frequency, 5G NR N77, N78 modes. 
     
     
       14. The electronic device of  claim 10 , wherein when the second feed point supplies a current, the current flows through the portion of the second radiation portion between the second feed point and the second ground point, and is grounded through the second inductive element, to excite an 5G NR N79 mode. 
     
     
       15. The electronic device of  claim 10 , wherein the housing comprises a side frame, the first radiation portion and the second radiation portion are positioned on the side frame. 
     
     
       16. The electronic device of  claim 10 , wherein n when the first feed point supplies a current, the current flows through the portion of the first radiation portion between the first feed point and the second gap, and is grounded through the first inductive element, to excite an ultra-high frequency and a 5G NR N79 mode. 
     
     
       17. The electronic device of  claim 10 , wherein the antenna structure further comprises a switch point, wherein the switching point is located on the first radiation portion adjacent to the first gap relative to the first feed point, the switching point and the first ground point are positioned at two sides of the first feed point, the switching point is grounded through a switch circuit. 
     
     
       18. The electronic device of  claim 17 , wherein the switch circuit comprises a switching unit and a plurality of switching elements, the switching unit is electrically connected to the switching point, one end of each switching element is electrically connected to the switching unit, and the other end of each first switching element is grounded.